Dust-collector.



un. 633,954. Patented sep. 2s', |899.

" P. EBEBWEN.

DUST II.'N.|..EG`I'.\R.` Appxmzipn nad .my 1a, 1899.,

4 Sheets-Sheet (ln luigi.)

l Patenten; sept. 26,1899.

P. EBERWEIN..

DUST CDLLECTUR. (Appumton med .my 1a, 1599.)

Sheets-.Sheet 3 (No Model.)

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P. EBERWEIN.

DUST GULLECTOB.

Applicltcmled July 13, i899.) (K9 Modal.) 4 Sheets-Shut 4, f

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syEcIFrcA'roN' forming part of Letters Patent No. 633,954, dated september 26, 1899.

Application filed July 13,1899. Serial No. 723,647. (No model.)

To all whom, it 11u03/ concern: g

Beit known that I, PAUL EBERWEIN, a citizen of the United States, residing at Jackson,

in the county of Jackson'and State of Michigan, have invented new and useful Improvements in'Dust-Collectors, of which the following is a specification.

This invention relates to that class of dustcollectors which comprise upright filtering`v a large area of eiicient filtering-surface is secured in a comparatively'small space, that any of the filtering-chamberscan be readily removed when necessary for cleaning or repairing and* that access' can be readily had to both sides of each filtering-cloth, that the dustcollector is simple in construction and capable of being produced at comparatively small cost, and that a thorough and automatic cleaning of the filtering-clothsis effected.y

In the accompanying drawings, consisting of four sheets, Figure l is a longitudinal section of a dust-collector provided with my imi provements. Fig. 2 is a vertical cross-section of the same in line 2 2,'Fig. l. Fig. 3 is a perspective view showing one of the filteringchambers and a portion of the lower dust-` chamber. Fig. 4L is a longitudinal vertical section showing the inner filtering-chambers of each group, with the cut-off slides in their central position. Fig. 5 is a fragmentary horizontal longitudinal section of the dustcollector in line 5 5, Fig. l, showing one group of filtering-chambers and one of the chambers of the other group. Fig. 6 is a fragmentary.

horizontal section through the upper dustchamber in line 6 6, Fig. 1, showing a portion of the upper cut-od slide. Fig, 7 is a horizontal section, on an enlarged scale, of the transverse springs of one of the filteringchambers. Fig. 8 is a horizontal section, on an enlarged scale, through the side portion of one of the iiltering-chambers. Fig. 9 is anv enlarged vertical section of one of the cross-bars of the lower slide and a portion of the top of the lower dust-chamber. Fig. l0 isa verticalsecton showing a modified con struction of the mahii`e,\-\

Like letters of reference refer to likerts\Y` in theseveral gures. A 6o A A represent the two groups of upright filtering-chambers; B, the upper dust-chamr ber, into which the dust-laden airis delivered by a blast-spouting @,the lower dust-chamber, which receives the separated dust from the iltering-chamberaand D the posts or uprights, which connect. the upperY and lower chambers at the corners thereof.

The upper and lower dust-chambers extend yfrom end to end ofthe machine, and the lter- 7o ing-chambers, which are fl and rectangular in form, are-arranged transverse y in an upright position between the bottom d of the u pper dust-chamber and the top e of the lower dust-chamber. The filtering-chambers are open at their upper and lower ends, and the bottom CZ of the upper dust-chamber and the tope of the lower dust-chamber are provided, respectively, with transverse slots CZ d2 e e2,

so arranged that the filtering-chambers com-' 8o municate with these slots when in place.

The filtering-chambers are arranged in two groups, each extending from one encf the machine-to near the middle thereof, and each composed of asuitable number of chambers. Y Each ltering-chamber is constructed as follO'WS:

Y F represents light rectangular wooden frames composed of uprights or stiles fand top and bottom cross-pieces f. Y

f2 represents the filter-cloths, which are ar ranged on the inner or opposing faces of each pair of frames .F and secured to the frames by tacks or in any other suitable manner. Two'of these frames F are secured to opposite 95 sides ofl interposed upright side pieces g by bolts g',-Figs. 3 and S. The outer portion of obstructed, except at the sides, thus leaving each chamber open at the top and bottom. The slots cl' d2 c' c2 in the upper and lower dust-chambers are of the proper size to register with these openings of the filtering-chambers.

Each cross-piece j" of the filtering-chamber is constructed with a rabbet or offset h, which overlaps a rail or cleat h', arranged transversely between every two of the slots in the bottom of the upper d ust-chamberand the top of the lower dust-cham ber. The two rabbeted cross-pieces j" of the top or bot-tom of the same dust-collecting chamber t between two adjoining rails or cleats It', which latter form transverse guideways, into which the chambers are slid for placing them in the proper position between the upper and lower dust-chambers. Each rabbeted cross-piecef' laps over half the width of the rail, so that each rail receives the cross-pieces of two adjacent filtering-chambers.

Each of the frames Fis provided at its middle with a transverse wooden spring I, which is secured with its ends to the stilesf of the frame and extends across the open space of the frame. The inner face of the spring is straight and flush with the inner faces of the stiles, so that the lter cloth lies snugly against the same and may be fastened thereto, if desired. The outer side or back of the spring is considerably thicker at the middle than elsewhere, as shown at t', and of such size that the back of the spring of one filtering-chamber bears against the back of the adjacent spring of the adjoining chamber.

7c represents space-blocks, which extend in each filtering-chamber from the spring of one cloth-frame F to that of the opposing clothframe, thus establishing a rigid connection from one frame to the other. Two of these blocks are preferably employed side by side in each chamber near the middle thereof and secured by screws or otherwise to one of the springs; but one centrally-arranged block may be employed, although that construction is less effective. These blocks are preferably constructed with inclined upper sides to shed the dust which afalls on them.

k' represents an upright wooden strip which is arranged midway between the stiles f of each cloth-frame F to support the cloth when the frame is so wide that a central support is desirable.

7c? represents longitudinal strips, which are secured along the front and rear sides of the bottom and top d e, respectively, of the upper and lower dust-chambers. These strips project downwardly beyond the bottom d and upwardly beyond the top c and bear against the narrow sides or ends of the filtering-chambers, holding the latter in place. The outer overlapping portion of the stilesfof the clothframes F are cut away at their upper andl lower ends to make room for these strips, as shown in Figs. 2 and 3. Upon removing the strips 7a2 on one side of the machine any one of the chambers can be removed by sliding it out of its ways without disturbing any other chamber. 'Upon closing the slots which are exposed by the removed chamber by suitable strips and bridging the open space between the springs of the chambers next adjoining the removed chamber the machine can be continued in use while the removed section is being cleaned or repaired. Upon removing the fastening-bolts which connect the clothframes F of the removed section these frames can be separated and access can be had to the inner side ot' each filter-cloth for thoroughly cleaning the same itnecessary or for removing the cloth from the frame and applying a fresh cloth.

L L represent two uprights arranged between the groups A A' of iiltering-chambers and secured to the upper and lower dnstchainbers. Each upright forms an abutment for the springs of one group offiltering-chambers and is provided with a spiral or other suitable spring Z, against which the innermost spring I of the group abuts.

M is a hammer or knocker which is arranged to strike the outermost spring I of the group A of filtering-chambers, and M is a similar knocker which strikes the outermost spring of the group A'. The blow of each knocker, delivered against the .outermost spring of the group, passes through all the springs and space-blocks of the chambers in the group and is finally yieldingly received by the spiral spring. In this manner all the cloths in the same group are jarred simultaneouslyand verythoroughly. The knockerM is mounted on a horizontal shaft m, which is journaled in bearings secured to the adjacent end posts D. This shaft is provided at one end with an arm 972/, which is actuated by a finger or projection m2 on a sprocket-wheel N. The knocker M is arranged at the opposite end of the machine and mounted on a shaft m3, which is provided With an arm m4. The latter is actuated by a pin or projection m5 on a sprocket-wheel N.

O represents the upper cut-off slide, ar-

ranged upon the bottom d of the upper dust- -chamber, and P the lower cut-olf slide, ar-

ranged underneath the top e of the lowerdustchamber. Each of these slides is capable of a short horizontal reciprocating movement, and consists of longitudinal side pieces, which are connected by cross bars or slats. The upper slide is provided with two series of crossbars O O2, one series to cover and uncover the slots d', through which the dust-laden air is supplied to the group A of the filteringchambers, and the other series to cover and uncover the slots d2 for the chambers A. The lower slide is provided with two similar series of cross-bars p p', one for the slots e', through which the dust is discharged from the chambers A, and the other for the slots e2, through which the dust is discharged from the chambers A. The two series of bars are so arranged on each slide that when one series ICO IOS

IIO

`to jar the dust from the cloths.

covers the corresponding slots the other se-V ries uncovers the slots with which it coperates, and the upper and lower slides are so arranged with reference to each other that p when the upper slide'covers the upper slots of a group of ltering-sections the lower slide uncovers the lower slots of the same group. In the position of the part-s shown in -Fig. l

.the bars O of the upper slide uncover the slots d', leading tothe filtering-chambers A, and the dust-laden air enters the same. The bars O2 of the upper slide cover the slots d2, leading to the filtering-chambers A', and eX- clude the dust laden air therefrom. The

lknocker M is about to strike the chambers the chambers A' can drop into the lower dustchamber. The two slides are periodically moved in opposite directions, so that vthe position of the slides is reversed, the upper slide cutting OEE the d ust-laden air from the chambers A and admitting the air to the chambers yA and the lower slide opening the slots'below theV chambers A and closing those below' the chambers A; ln passing from one position to the other thel cross-bars of the slides uncover all of the slots partly and simultaneously for a short period of time when the slides are, with their edges, approximately opposite the middle/of the slots, as represented in Fig. 1i. In this position of the slides the dust-laden air is admitted to the chambers Y ofk both groups simultaneously, whereby th filtering capacity of all the chambers is uti ized simultaneously part of the time, whil at other times one of the-groups is cut off t allow the same to be jarred for dislodgin g the d ust adhering to the cloths. The upper slide O rests upon the bottom dof the upper dustchamber, and its side pieces make, preferably, a tight joint with the bottom by a longitudinal tong-ue and groove O3 and are prevented from rising by guide-strips O4. The lower slide P bears against the underside of the top e of the lower du sti-chamber and is preferably provided with a similar tongue-andgroove joint p2 and slides upon guide-strips '193.

As shown in the drawings, theu'pper slide is reciprocated by a crank q, mounted on a shaft q and connected with the slide by a rod q2. The shaft q' is provided with a sprocketwheel Q. The lower slide is reciprocated by a 'crank g3, mounted on a shaft Q4 diametrically opposite the crank q and connected with the slide by a rod g5. The shaft ql'is provided with a sprocket-wheel QJ. This crank movement causes the slides to cover the slots about one-third of the time. Y The cross-bars ofthe 'veyen upperslide have sloping upper ,sides to shed the dust which falls on them. The lower sides of the lower slides may be similarly shaped, as shown; but this is unimportant.

As shown in Fig. Q, the top e of the lower dust-chamber is preferably provided on both sides of each slot with a packing-strip r of cotton belting or other suitable material, arranged on edge in recesses in the top and projecting slightly to make a tight join-t with the cross-bar of the slide when the bar covers the slot. The bottom of lthe upper dust-chamber is provided with rsimilar packing-strips.

Thelower dust-chamber is provided with an endless sweep' or drag S, which consists of endless chains s, carrying cross-bars s' and running around sprocket-wheels s, mounted on transverse shafts s3, which are provided at their outer ends with driving sprocket-wheels s4. This drag conveys the dust to a trough $5, arranged transversely at one end of this dustchamber and 'containing a-conveyer s, by which the dust is discharged. The dischargeopening s of this conveyer is trapped in any suitable way to prevent the dust from being blown out through the same when the slides uncover the upper and lower slots simultaneously. Ordinarily it is sufcient for this purpose to arrange the discharge-opening $7 above the bottom of the trough, as shown, so that it is kept full of packed dust by the con- The shaft of the latter is provided with a driving sprocket-Wheelt and with a pulley T, to which power is applied. An endless chain T travels around the sprocketwheel t, thence around the sprocket-wheel Q of the lower slide,thence around the sprocketwheel N of the knocker M, thence around the sprocket-wheel Q of the upper slide, thence around the sprocket-wheel N' of the knocker M', thence around the sprocket-wheels s4 of the drag S, and thence back tothe sprocketwheel t. Any other suitable driving mechanism may, however, be employed, if desired.

Itis obvious that the machine may be modiiied in various respects without departing from the spirit of the invention. For instance, the lower cut-od devices may be omitted, as represented in Fig. 10, by dividing the lower dust-'chamber into two separate parts C C', each of which has aseparate discharge conveyer C2 or other suitable discharge mechanism. A

I claim as my inventiony l. The combination with an upper chamber which receives the dust-laden air and a lower chamber-'which receives the separated dust, of upright filtering-chambers arranged between said chambers and communicating IOO' IIC

therewith, and upper and lower cut-olf' de- Y 2. The combination with an upper chamber which receives the dust-laden air and a lower chamber which receives the separated dust, of upright filtering-chambers arranged between said lchambers and communicating therewith, u pper and lower cu t-oif slides which control the passages leading to and from said iiltering-chambers, and means whereby said slides are reciprocated in opposite directions, substantially as set forth.

8. The combination with an upper cham ber which receives the dust-laden air and a lower chamber which receives the separated dust, of two groups of upright filtering-chambers arranged between said upper and lower chambers and communicating therewith, and reversible cut-oit devices which direct the dustladen air into one of said groups of iilteringchambers and exclude the dust-laden air from the other group, substantially as set forth.

4. The combination with an upper chamber which receives the dust-laden air and a lower chamber which Areceives the separated dust, of two groups of upright filtering-chambers arranged between said upper and lower chambers and communicating therewith by upper and lower passages, and upper and lower reversible cut-oft` devices which simultaneously open one group and close the other group of upper passages and which simultaneously close one group and open the other group ot' lower passages which lead from the filteringchambers to the lower dust-chamber, substantially as set forth.

5. The combination with an upper chamber which receives the d ust-laden air and a lower chamber which receives the separated dust, of two groups of upright filtering-chambers arranged between said upper and lower chambers and communicating therewith by upper and lower passages, reversible cut-off devices arranged to open one group of passages and close the other group of passages simultaneously, and means whereby said cut-off devices are slowly reversed, thereby opening both groups ot' passages simultaneously for a time in passing out of one position to the other, substantially as set forth.

6. The combi nation with an upper chamber which receives the dust-laden air and a lower chamber which receives the separated dust, of two groups of upright filtering-chambers arranged between said upper and lower chambers and communicating therewith by upper and lower passages, upper and lower reversible cut-off devices arranged to open one group and close the other group of upper passages and to simultaneously close one group and open the other group of lower passages, thereby admitting the dust-laden air to one group of iiltering-chambers and excluding it from the other, and means whereby said cut-off devices are slowly reversed, thereby opening all the passages simultaneously in passing from one position to the other, and admitting the dust-laden air to both groups of filteringchambers simultaneously fora time, substantially as set forth.

cranks whereby said slides are reciprocated,

substantially as set forth.

8. The combination with an upper chamber which receives the dust-laden air and which is provided in its bottom with a series of parallel transverse openings, and a lower chamber which receives the separated dust and which is provided in its top with corresponding openings, of vertical filtering-chambers open at their upper and lower ends and arranged between said upper and lower chambers to register with the openings therein, and` upper and lower cut-oftl slides arranged lengthwise in said upper and lower chambers are provided with cross-bars by which said openings are alternately covered and uncovered, substantially as set forth. y

Si). The combination with an upper chamber which has a horizontal bottom provided with a series of parallel transverse openings, a

lower chamber which has a horizontal top provided with a series of corresponding transverse openings, guide-rails secured to the under side of said bottom and the upper side of said top, between the openings of said bottom and top, and posts whereby said upper and lower chambers are united to a rigid frame, of filtering-chambers, open at their upper and lower ends to register with said openings, arranged to tit between said chambers and rabbeted or offset at their upper-,and lower ends` to overlap said guide-rails, substantially as set forth.

10. The combination with a chamber which receives the dust-laden air and which is provided with a series of parallel openings, of

parallel filtering-chambers communicating with said openings and provided with external springs having enlargements by which the springs of adjoining chambers bear against each other, and a knocker by which the spring of the end filtering-chamber is struck, substantially as set forth.

ll. The combination with a chamber which receives the dust-laden air and which is provided with a series of parallel openings, of parallel iiltering chambers communicating with said openings, each chamber provided on opposite sides with external springs having enlargements by which the springs of adjoining chambers bear against each other, internal stay-blocks connecting the springs of each chamber, and a knocker by which the spring of the end filtering-chamber is struck, substantially as set forth.

l2. In. a dust-collector, a flat rectangular IIO 633,954 o v s springs of adjoining chambers bear against each other, of a, knoeker which strikes the spring at one end of the series of filteringchambers, and a yielding abutment which supports the spring at the opposite end of the series, substantially as set forth.

14. The combination with an upper chamber which receives the dust-laden air and a lower chamber whioh receives' the separated dust, of two groups of upright filtering-ohnmbers arranged between said chambers and communicating therewith, and provided with external springs' which bear against each other, knoekers arranged to strike the springs at the outer ends of the groups of filteringchambers, yielding abutment-s arranged between the groups of filtering-chambers and supporting the springs at the inner ends thereof, and reversible eut-off devices whereby the dust-laden air is directed to one group of l' Vterizig-elmmhers and excluded from the other,

substantially as set forth.

Witness my hand this 10th day of July, 1899.

PAUL EBERWEIN. Witnesses:

JOHN L. BENTLEY, MONICA B. THOMPSON. 

